On Saturday, Nguyen sent a series of tweets warning that he was going to remove the app in just 22 hours. Fans pleaded with him to keep it available, but by Sunday at 12 p.m. ET, the app was no longer downloadable.

I am sorry 'Flappy Bird' users, 22 hours from now, I will take 'Flappy Bird' down. I cannot take this anymore.

Although the app launched in May 2013, it became an overnight sensation this week as it climbed to the top free app in Apple's App Store and Google Play for Android. The game was reportedly bringing in about $55,000 in ad revenue.

Perhaps the app went viral because it is so frustrating play. The concept of the game is to keep a bird afloat by tapping it through a series of obstacles. The game is designed to be simple, but the task is extremely difficult.

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